What is CVE-2026-13188?

CVE-2026-13188 is a medium-severity vulnerability in Progress Software Telerik Ui For Asp.net Ajax, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.9/10. Published 2026-07-22.

How severe is CVE-2026-13188?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Progress Software Telerik Ui For Asp.net Ajax

CVE-2026-13188

In Progress® Telerik® UI for AJAX prior to v2026.2.708, DialogHandler request parameters may be tampered with, potentially altering dialog server-side behavior and enabling chained exploitation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Progress Software Telerik Ui For Asp.net Ajax — versions 2011.2.712

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

security@progress.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-13188?: CVE-2026-13188 is a medium-severity vulnerability in Progress Software Telerik Ui For Asp.net Ajax, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.9/10. Published 2026-07-22.
How severe is CVE-2026-13188?: Medium severity. CVSS v3 base score is 5.9 out of 10.